How to manage only one oneToMany entity in parent form - forms

Question

I have an Entity Criteria which can have several Entity Vote (associated).
I want to DISPLAY a list of criteria and to show only ONE Vote form in front of each Criteria (not zero, not many), to allow user to vote for each Criteria.
But, as I have a oneToMany association, in my CriteriaForm, I must have a CollectionType of Vote (I think ?). I tried to have only a VoteType :
$builder->add('votesCritere', VoteCritereType::class);
but I have an error :
The form's view data is expected to be an instance of class LabelBundle\Entity\VoteCritere, but is an instance of class Doctrine\ORM\PersistentCollection
So I think I must have a CollectionType. But, if I have a collection type, I start with ZERO form (because My Criteria does not contain any Vote yet).
I want to have only (and always) one Vote form in front of each criteria, to add a vote to the criteria (I don't want the number of forms reflects the number of votes)
How can I do that ?
Thanks for your help !

Answer 1

Let's think out loudly - in case you use entity bind form with collection type for votes, it'll allways show all of yours votes that would be bind to each criteria.
In this case I would recommend the array of forms based on criteria entity IDs.
Create Vote form type:
class VoteType extends AbstractType
{
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->add('answer', ChoiceType::class, array(
'choices' => array(
'Yes' => true,
'No' => false,
)
))
->add('note', TextareaType::class),
->add('criteriaId', HiddenType::class),
->add('vote', SubmitType::class);
...
...
}
In the controller - get traversable of criterias (e.g. method findAll() method of repository) and create array of named forms based on criteria entity IDs:
$ff = $this->get('form.factory');
foreach ($criterias as $criteria) {
$voteForms[] = $ff->createNamedBuilder(
'vote_'.$criteria->getId(),
new VoteType,
array(
'criteriaId' => $criteria->getId()
)
)
->getForm()
->createView();
}
return $this->render(someView, array("voteForms" => $forms));
And when the form is submitted then you can identify to which criteria the vote belongs by the hidden criteriaId field.
EDIT - Added: How to submit all forms with one button
'criteriaId' field and 'vote' submit in the VoteType is no longer needed - so:
class VoteType extends AbstractType
{
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->add('answer', ChoiceType::class, array(
'choices' => array(
'Yes' => true,
'No' => false,
)
))
->add('note', TextareaType::class);
...
...
}
And in the controller just create form with VoteTypes members:
$fb = $this->createFormBuilder();
foreach ($criterias as $criteria) {
$fb->add('vote-criteria-'.$criteria->getId(), VoteType::class);
}
$fb->add('submit', SubmitType::class);
$frm = $fb->getForm();
$frm->handleRequest($request);
if ($frm->isSubmitted() && $frm->isValid()) {
// all criteria vote data
$frm->getData();
...
}
return $this->render(someView, array('form' => $frm->createView()));